Re: vector related help - C / C++ / MFC Discussion Boards

Re: C++ - "We don't use STL here"

C^hris L^osinger24-Jun-05 5:50

C^hris L^osinger

24-Jun-05 5:50

hmm.

i knew about the deque problem. didn't know about the others.

Cleek | Image Toolkits | Thumbnail maker

Re: C++ - "We don't use STL here"

Trollslayer24-Jun-05 4:47

Trollslayer

24-Jun-05 4:47

I don't want to seem judgemental but he's an idiot or a C programmer who doesn't want to learn.

Elaine Rose | [Rose]

The tigress is here Big Grin | :-D

Re: C++ - "We don't use STL here"

Kevin McFarlane24-Jun-05 5:42

Kevin McFarlane

24-Jun-05 5:42

He was quite a clever guy. But he did seem to have a fondness, not so much for MFC, but for "C-style" C++. Lots of low-level methods, void*s and unnecessary dynamic allocations. But as his code generally seemed to work I guess his attitude is: if it ain't broke, don't fix it. Problem is it's not very friendly to the coder who has to understand his code.

Kevin

h323 connection to Cisco Call Manager 4.1 ?

JankoH23-Jun-05 23:23

JankoH

23-Jun-05 23:23

Hello,

does anybody of you know about how to connect to Cisco Call Manager 4.1(2) ? I'd like to monitor incomming calls... I don't want to use CiscoTSP, so the only? way to do this is SCCP, which communicates through h323 protocol. Are there any libraries which could I use ? (I found openh323 library, but no examples on how to use it). My biggest problem is the connection to call manager (Using TAPI 2.x and h323.tsp I was not able to change the IP addres where it should look for call manager) ...

CAsyncSocket: Pass the Proxy

f_ika_s23-Jun-05 22:50

f_ika_s

23-Jun-05 22:50

I use CAsyncSocket class in my client application, if the server use proxy,
how can the client connect to server (passing the proxy)?
thanks in advance Smile | :)

Ika

Re: CAsyncSocket: Pass the Proxy

munawar196823-Jun-05 22:59

munawar1968

23-Jun-05 22:59

1. Speak CERN proxy syntax to the proxy server at PROXYIP:PROXYPORT
e.g "CONNECT MYSERVERIP:MYSERVERPORT HTTP/1.1"

2. Use WinInet API instead
e.g Use InternetOpen() with Flags INTERNET_OPEN_TYPE_PRECONFIG_WITH_NO_AUTOPROXY
or
INTERNET_OPEN_TYPE_PROXY

vector related help

itkid23-Jun-05 22:25

itkid

23-Jun-05 22:25

Hi,
I have to store 10 strcture in vector.
struct
{
int
int
int
int
};
Can you please help me. I am new to stl programming.

Thanks

Re: vector related help

Cedric Moonen23-Jun-05 22:38

Cedric Moonen

23-Jun-05 22:38

Do something like that:

Suppose the structure is called YourStruct.
The vector is declared like that:
std::vector<YourStruct> YourVector;

To add elements in the vector:

for (int i=0;i<10;i++)
{
YourStruct TestStruct;
// Fill the structure

YourVector.push_back(TestStruct);
}

IP address

ask_you23-Jun-05 21:25

ask_you

23-Jun-05 21:25

Is it possible to create IP address box without using MFC?
i mean a plain Win 32 application

Re: IP address

ThatsAlok23-Jun-05 21:37

ThatsAlok

23-Jun-05 21:37

ask_you wrote:
Is it possible to create IP address box without using MFC?

Yeap

ask_you wrote:
i mean a plain Win 32 application
here is the class SysIPAddress32 you have to pass in CreateWindow to dynamically create IpAddressCtrl

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: IP address

ask_you23-Jun-05 22:58

ask_you

23-Jun-05 22:58

Thanx
i tried to implement the IP address using the following code

hWnd = CreateWindowEx(NULL,ClsName,WndName,WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 300, 200, NULL, NULL, GetModuleHandle(NULL), NULL);

HWND IPAddrWindow = CreateWindow("SysIPAddress32",NULL, WS_VISIBLE|WS_CHILD,35,55,250,30,hWnd,NULL,NULL,NULL);

But its not created... only the blank base window is displayed. where am i wrong?

Another Easy Q...About string..

ana_bahy23-Jun-05 21:20

ana_bahy

23-Jun-05 21:20

Can i ask you 1 more question , (if u dont mind)
How can i ask the user to insert a string , and to be saved in Title
i believe if it was a char[30] i can use

char Title[30];
cin.getline(Title,30);

But what is the case if it String??

My regards,
Bahy

Re: Another Easy Q...About string..

Cedric Moonen23-Jun-05 21:48

Cedric Moonen

23-Jun-05 21:48

What about this:

char Title[31];
cin.getline(Title,30);
std::string String1 = Title;

Remark: don't forget that if you want to store 30 characters in a char string, you will need to store one extra character that is the null-termination char. Thus you have to declare your array like that: char Title[31];

Re: Another Easy Q...About string..

ana_bahy23-Jun-05 21:55

ana_bahy

23-Jun-05 21:55

it did not solve the problem
ok..i wana make it a string , with unfixed length so its gona be like:
string Title;
but how can i ask the user to cin??
is it cin>>Title;
umm it wont work , because the string got spaces , so what will be the command ??

Re: Another Easy Q...About string..

David Crow24-Jun-05 2:54

David Crow

24-Jun-05 2:54

ana_bahy wrote:
Can i ask you 1 more question , (if u dont mind)

You do not need anyone's permission to post questions here.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

conversion confusion...

GDavy23-Jun-05 21:00

GDavy

23-Jun-05 21:00

Ok I`ve got this weird problem here....
In a certain func I wrote I need to split a double into 2 integers, the fractional part up to x digits and the decimal part.
See here for the splitting part:

void AFunction( double dNumber, int acc )<br />
{<br />
 //acc is the nr of digits of the fractional part that should be converted.<br />
 int nDecim = (int)dNumber; // this correctly keeps the decimal part.<br />
<br />
 int nFract = (int) ( (double)(dNumber-nDecim) * pow(10,acc) ); //this line has a problem<br />
<br />
 .... //do loads of stuff, like keeping COSMOS1 in undetectable orbit<br />
}

the bizarre thing is that the calculation of nFract works in most of the cases, except in some cases where there is only 1 decimal (e.g. when acc=3, 2.222(nFract=221) and 1.111(nFract=110) fail, but 3.333 doesn`t nor does 22.222 or 11.111...?? Confused | :confused:

)

So I figured, maybe the compiler got confused or so D'Oh! | :doh:

. I split the calculation of nFract in 4 lines and debugged...
(results I mention are with params dNumber=2.222, and acc =3

<br />
int nDecim = (int)dNumber;    // result: nDecim = 2 ok<br />
double dTemp = dNumber - nDecim; // result dTemp = 0.222 ok<br />
int nFactor = pow(10,acc); // result nFactor = 1000 ok<br />
int nFract = dTemp * nFactor // result nFract = 221 NOT OK!!!!!<br />
//so hey I figured lets try an extra step...<br />
double dInterMd = dTemp * nFactor; // result dInterMd = 222.0 ok haha getting close!!<br />
nFract = (int)dInterMd; //result nFract = 221 NOT OK!!!???<br />

once again 22.222 with acc 3 works fine 1.111 has similar problem 3.333 works fine...
I`m at a loss here... What the hell is going wrong?????

Re: conversion confusion...[Modified]

ThatsAlok23-Jun-05 21:20

ThatsAlok

23-Jun-05 21:20

GDavy wrote:
In a certain func I wrote I need to split a double into 2 integers, the fractional part up to x digits and the decimal part.

What about this Code Mr Davy,

CString MainStr,;
int Num1,Num2;
 // get Double in String
  MainStr.Format("%e",100.200);

// Get Non decimal Part
 Num1=atoi(MainStr.Left(MainStr.Find('.')));

//get decimal part
 Num2=atoi(MainStr.Right(MainStr.GetLength()-MainStr.ReverseFind('.')-1));

I havn't tested this code, but i believe it will work Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: conversion confusion...[Modified]

GDavy23-Jun-05 21:57

GDavy

23-Jun-05 21:57

thx for the reply..
I`m trying to avoid conversion to string and getting the data out of there, to avoid excess memory and process time..
I know in modern days noone cares about mem or process time anymore, but the devices I write for have limits.
(and keeping Cosmos 1 in that undetectable orbit requires process speed Poke tongue | ;-P

)

Re: conversion confusion...

Weiye Chen23-Jun-05 21:26

Weiye Chen

23-Jun-05 21:26

Did you try converting the double value to string and manipulate from there, like finding the '.' character and extracting the string before and after it?

<font=arial>Weiye Chen
Life is hard, yet we are made of flesh...

Re: conversion confusion...

GDavy23-Jun-05 22:20

GDavy

23-Jun-05 22:20

)

Re: conversion confusion...

Rage23-Jun-05 21:51

Rage

23-Jun-05 21:51

GDavy wrote:
What the hell is going wrong?????

From the MSDN, about conversion:

From double To long, Method: Truncate at decimal point. If result is too large to be represented as long, result is undefined.

~RaGE();

Re: conversion confusion...

GDavy23-Jun-05 22:03

GDavy

23-Jun-05 22:03

Thx for the reply..

the numbers I pass as parameters are small enough to be contained in an integer (see the values I passed in original post where problem occurs)

The problem lies in rounding I found out... somehow it keeps some rounding bit around when converting the double to int. So going from there I will fix the problem I think (hope) Unsure | :~

Re: conversion confusion...

mekanoo23-Jun-05 22:33

mekanoo

23-Jun-05 22:33

....ha ! what a buggy thing..!
did you think about bitwise extraction ?
single and double are stored in a defined as'IEEE_754' standard:
1.Bit = +/-
2.-9. is Exponent
10.-32. is Mantisse
but all is counted from right to left &
starting with 0. to 31......so
have look at these definitions and get your numbers as bits from there

Typ Gesamtgröße Mantisse Exponent Bias
single 32 bit 23 bit 8 bit 127
double 64 bit 52 bit 11 bit 1023
Smile | :)

http://www.computerbase.de/lexikon/IEEE_754

Re: conversion confusion...

mekanoo23-Jun-05 22:53

mekanoo

23-Jun-05 22:53

...a little grammar confusion in my last reply....

i want to add:
i had to deal with the extraction of 'float'= single and 'real'= double data
from a stream.
so i looked for bit-manipulation code thats around..because it's not really easy.
1. the exponent is stored with added value to avoid negative numbers...
2. the whole number is a expression from 2^xyz ....
&&&

--------------
if that doesn't help you really then it gives you at least ahint for the reason of that conversion phanomena.
-------------
.Net Framework helped me out there wit the BitConverter Class.... Suspicious | :suss:

Re: conversion confusion...

GDavy23-Jun-05 23:21

GDavy

23-Jun-05 23:21

Thanks for the reply..
I looked up the IEEE standard you mentioned for floating point arithmetic.. Nice documentation, thanks. It's indeed explaining the peculiar behaviour I noticed.
Been so long since I looked at a basic C-type at such a low level that it was a nice refreshment!
Rose | [Rose]

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